MIL-STD-704 Aircraft Electrical Power Characteristics is a
United States Military Standard
A United States defense standard, often called a military standard, "MIL-STD", "MIL-SPEC", or (informally) "MilSpecs", is used to help achieve standardization objectives by the United States Department of Defense.
Standardization is beneficial ...
that defines a standardized power interface between a
military aircraft and its equipment and carriage stores, covering such topics as voltage, frequency, phase, power factor,
ripple, maximum current,
electrical noise
In electronics, noise is an unwanted disturbance in an electrical signal.
Noise generated by electronic devices varies greatly as it is produced by several different effects.
In particular, noise is inherent in physics and central to therm ...
and abnormal conditions (overvoltage and undervoltage), for both AC and DC systems.
MIL-HDBK-704 is a handbook that provides guidance on test procedures for demonstration of utilization equipment to determine compliance with the aircraft electrical power characteristics of MIL-STD-704, revisions A through F. MIL-HDBK-704 is divided into 8 parts. Part 1 provides general guidance information on compliance tests, power groups, aircraft electrical operating conditions, and utilization equipment specifications. Parts 2 through Part 8 provide guidance on application of compliance tests for utilization equipment in specific power groups.
Electrical system
The standard defines the basic aircraft AC system at 115/200 volts, 400 Hz (the larger figure indicating
three-phase power). Variable frequency systems are allowed to switch between 360 and 800 Hz. Double voltage systems use the same frequency at 230/400 volts. Secondary power systems can be variable frequency or double voltage; they can also use 115 volts, 60 Hz to run
commercial off-the-shelf products expecting
mains electricity
Mains electricity, utility power, grid power, domestic power, wall power, household current, or, in some parts of Canada, hydro, is a general-purpose Alternating current, alternating-current (AC) electric power supply. It is the form of electri ...
.
The DC system runs at 28 volts or 270 volts.
[MIL-STD-704F, section 5.3.1]
References
External links
MIL-STD-704F Standard - currently issue F (03-2004)MIL-STD-704 Standards
MIL-HDBK-704 (with notations)
Military of the United States standards
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